An irrigation system suitable for corner positions is composed of a centrally rotational supporting structure, a primary water beam linked to said supporting structure in rotary mode, an extended beam linked to the external end of said primary beam in rotary mode and supported by a driven pylon and a sensor for measuring the included angle between primary beam and extended beam. Said extended beam has multiple the first water sprayers with nozzle sizes increased from internal end to external end of extended beam and multiple the second water sprayers with nozzle sizes increased from external end to internal end of extended beam.